{"id":5420,"date":"2024-12-26T14:34:19","date_gmt":"2024-12-26T20:34:19","guid":{"rendered":"https:\/\/adcaraudio.com\/store\/?post_type=product&#038;p=5420"},"modified":"2025-11-08T09:51:11","modified_gmt":"2025-11-08T15:51:11","slug":"m15-master-series-15-subwoofer","status":"publish","type":"product","link":"https:\/\/adcaraudio.com\/store\/product\/m15-master-series-15-subwoofer\/","title":{"rendered":"M15 &#8211; Master Series 15&#8243; Subwoofer"},"content":{"rendered":"<h1>Overview<\/h1>\n<p>The Master Series M15 subwoofer is a high stroke, low distortion subwoofer tailored for moderate to large sealed applications and infinite baffle.\u00a0 The M15 uses a composite fiber cone with a dual gap magnetic structure. The M15 yields 40mm of peak to peak linear excursion and 65mm peak to peak mechanical excursion.\u00a0 The 76.2mm diameter voice coil with aluminum former ensures high power handling.<\/p>\n<p>The M15 uses a ferrite magnet of Y35 grade.\u00a0 With the machined 1010 grade steel for the yoke and washers, the resulting in-gap field strength is 0.5 Telsa.\u00a0 The dual 2 layer (total of 4 layers) pure copper voice coil configuration offered in 2 and 4 Ohm nominal per voice coil offers a range of impedances from 1 to 8 Ohms.<\/p>\n<p>The 38mm thick dual gap top plate assembly features a 20mm tall and 14mm deep rebate.\u00a0 This allows for extended travel and greatly flattened BL (motor force) over stroke.\u00a0 The rebate is filled with a 3.5mm thick aluminum ring to reduce inductance resulting in a usable bandwidth to 1 kHz, for exceptional transient performance.<\/p>\n<h2>Crossover Frequency<\/h2>\n<p>As the M15 is a subwoofer, it should be low passed as low as possible.\u00a0 The actual frequency of crossover should be determined by the capability of your components that cover the mid-bass\/midrange frequencies.\u00a0 Typically a crossover point below 80 Hz is recommended.\u00a0 Raising the crossover point can pull the image more towards the M15, but it can also increase the mid-bass output of the system.\u00a0 As always, every install is different and final system settings should be done based upon your application and mating equipment.<\/p>\n<h2>Power Handling<\/h2>\n<p>Power handling for subwoofers has two basic considerations: thermal power handling and mechanical power handling.\u00a0 It is quite possible to place a subwoofer inside a cabinet where the thermal power handling limit is reached well before the mechanical (motion based) power handling limit.\u00a0 Likewise, an enclosure can result in excessive motion and reaching the mechanical limit well before the thermal power limit.\u00a0 An excessively hot trunk, or well-insulated sealed box\/trunk situation can lower thermal power handling limits.<\/p>\n<p>Thus when installing a subwoofer one must consider the application in which the subwoofer will be installed, and ensure an appropriately sized amplifier is used to drive the subwoofer.\u00a0 It is often said \u201cclipping kills speakers\u201d but for subwoofers this is not necessarily true, as it is better to clip an amp a bit than to overpower a subwoofer.<\/p>\n<h1>Application Guidelines<\/h1>\n<p>The M15 woofer is best used in moderate sealed to infinite baffle.\u00a0 It can be used infinite baffle to the outside air but protection from the elements should be provided for the rear of the woofer. The best application is completely dependent upon the vehicle, position within the vehicle, and desired output and bandwidth of the system.\u00a0 Your installer should be able to use the provided information above to determine an ideal enclosure for your application.<\/p>\n<p>The M15 displaces 3.3 liters of air when installed in a cabinet.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-large wp-image-5421\" src=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-865x1024.jpg\" alt=\"\" width=\"865\" height=\"1024\" srcset=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-865x1024.jpg 865w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-600x711.jpg 600w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-253x300.jpg 253w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-768x910.jpg 768w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-1297x1536.jpg 1297w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-51x60.jpg 51w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements-76x90.jpg 76w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-measurements.jpg 1427w\" sizes=\"(max-width: 865px) 100vw, 865px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Dual 2ohm\u00a0<\/strong><\/p>\n<p>f(s)= 24.49 Hz<\/p>\n<p>R(e)= 3.716 Ohms<\/p>\n<p>Z(max)= 22.22 Ohms<\/p>\n<p>Q(ms)= 5.429<\/p>\n<p>Q(es)= 1.09<\/p>\n<p>Q(ts)= 0.908<\/p>\n<p>V(as)= 89.67 liters<\/p>\n<p>L(e)= 1.478 mH<\/p>\n<p>n(0)= 0.1152 %<\/p>\n<p>SPL= 82.72 1W\/1m<\/p>\n<p>M(ms)= 407.2 grams<\/p>\n<p>C(ms)= 0.104 mm\/N<\/p>\n<p>BL= 14.62<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-Klippel-TS-Parameters-Series.pdf\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone wp-image-5257\" src=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-1024x489.png\" alt=\"\" width=\"180\" height=\"86\" srcset=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-1024x489.png 1024w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-600x286.png 600w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-300x143.png 300w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-768x367.png 768w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-1536x733.png 1536w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-2048x978.png 2048w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-126x60.png 126w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-189x90.png 189w\" sizes=\"(max-width: 180px) 100vw, 180px\" \/><\/a><\/p>\n<p><span style=\"color: #808080;\">Click logo for Dual 4ohm report<\/span><\/p>\n<p>&nbsp;<\/p>\n<pre><a href=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/M15-Klippel-Xbl-Xc-Xl.pdf\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone wp-image-5257\" src=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-1024x489.png\" alt=\"\" width=\"180\" height=\"86\" srcset=\"https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-1024x489.png 1024w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-600x286.png 600w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-300x143.png 300w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-768x367.png 768w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-1536x733.png 1536w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-2048x978.png 2048w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-126x60.png 126w, https:\/\/adcaraudio.com\/store\/wp-content\/uploads\/KlippelLogo_Verifiedwith-189x90.png 189w\" sizes=\"(max-width: 180px) 100vw, 180px\" \/><\/a>\r\n<span style=\"color: #808080;\">Click logo for Bl, Cms, Inductance report<\/span><\/pre>\n","protected":false},"excerpt":{"rendered":"<h3><\/h3>\n<p>&nbsp;<\/p>\n<ul>\n<li>15.75&#8243; (400 mm) Subwoofer<\/li>\n<li>Custom tooled cast frame<\/li>\n<li>3&#8243; (76.2mm) copper voice coil on aluminum former for extreme power handling and motor force<\/li>\n<li>Dual gap motor with aluminum shorting rings for maximum motor force over stoke which delivers world class dynamics and impact<\/li>\n<li>+\/- 20mm of linear excursion<\/li>\n<li>Rubber surround<\/li>\n<li>Push pin terminals<\/li>\n<li>1,200 Watts RMS power handling*<\/li>\n<li>Also available in Dual 2ohm and Dual 4ohm<\/li>\n<li>Sold individually<\/li>\n<\/ul>\n<p style=\"background-color: rgba(0, 0, 0, 0) !important;\">* Power rating is based on 3.0cu.ft. sealed enclosure.\u00a0 Power handling will decrease as airspace increases with the benefit of a lower frequency roll-off (increased output below 40Hz).<\/p>\n","protected":false},"featured_media":5736,"template":"","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"product_brand":[],"product_cat":[78,79,18],"product_tag":[],"class_list":{"0":"post-5420","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-master-series","7":"product_cat-master-series-speakers","8":"product_cat-subwoofers","10":"first","11":"instock","12":"purchasable","13":"product-type-variable"},"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/product\/5420","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/media\/5736"}],"wp:attachment":[{"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/media?parent=5420"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/product_brand?post=5420"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/product_cat?post=5420"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/adcaraudio.com\/store\/wp-json\/wp\/v2\/product_tag?post=5420"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}